Window treatment accessory



FIG. 1 is a perspective view of the claimed window treatment accessory;

FIG. 2 is a front view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof.

The broken line showing of a support assembly in FIG. 1 is forillustrative purposes only and forms no part of the claimed design.

The ornamental design for a window treatment acessory, as shown anddescribed.